Flexible Fuel Hose Cummins 3974844 | 5318807, 4939472

High-Performance Flexible Fuel Hose for Cummins Engines

The Cummins 3974844 flexible fuel hose is designed to provide a secure, leak-free connection within your engine’s fuel system. Specifically engineered for Cummins ISB and QSB series engines, this hose connects the fuel filter head to the fuel transfer system, ensuring consistent fuel flow and optimal engine performance. This part is also available under the numbers: 5318807 and 4939472.

Constructed from high-grade, fuel-resistant materials, this flexible hose is built to withstand extreme temperatures, high pressures, and constant vibration. Replacing a worn or damaged fuel hose is critical to preventing fuel leaks, maintaining system pressure, and protecting your engine from fuel starvation or contamination.

Product Features & Benefits

• Engineered for Cummins Engines: Direct fit for Cummins ISB and QSB (including QSB 5.9 and QSB 6.7) diesel engines.
• Durable Construction: Made from premium materials designed to resist degradation from diesel fuel, heat, and environmental wear.
• Leak-Free Seal: Precision-engineered connectors ensure a tight, secure fit to prevent fuel pressure loss.
• Vibration Resistant: Flexible design absorbs engine vibrations, reducing stress on fuel system connections and extending service life.

Applications and Compatibility

This flexible fuel hose is commonly used in industrial, agricultural, and automotive applications featuring Cummins ISB and QSB diesel engines. It is typically associated with the fuel filter head assembly (such as part number 3975404 or Komatsu equivalent 6754-71-7200).

Cross-Reference / Interchange Part Numbers

This part replaces / is interchangeable with the following part numbers:

• 3974844
• 5318807
• 4939472